/* =====================================================================
   Corduroy how-to landing page, Alterra corporate identity.
   Framework-agnostic plain CSS. Tokens per the Alterra Brand Design
   Reference: Larken (serif display) + Graphik (sans body), warm-white
   surfaces, single saturated orange accent, pill buttons with the
   signature inset box-shadow sweep.
   ===================================================================== */

@import url("assets/fonts/graphik/fonts.css");

:root {
  /* Brand */
  --color-orange: #d44126;
  --color-orange-dark: #822717;

  /* Surfaces */
  --color-white: #ffffff;
  --color-off-white: #f3f2ee;
  --color-warm-white: #f3f3ef;

  /* Ink */
  --color-black: #000000;
  --color-alterra-black: #1F1F1F;
  --color-soft-black: #434343;

  /* Neutrals */
  --color-gray-100: #F4F4F4;
  --color-gray-200: #E6E7EC;
  --color-gray-300: #CCCCCC;
  --color-gray-500: #6A737B;

  /* Type */
  --font-serif: "larken", Georgia, "Times New Roman", serif;
  --font-sans: "Graphik Web", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  /* Radii */
  --radius-sm: 12px;
  --radius-lg: 14px;
  --radius-img: 20px;
  --radius-pill: 60px;

  /* Shadows */
  --shadow-xs: 0 4px 40px rgba(0, 0, 0, 0.05);
  --shadow-lg: 0 6px 14px 2px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-xl: 0 8px 16px -3px rgba(0, 0, 0, 0.1), 0 3px 6px -2px rgba(0, 0, 0, 0.05);

  /* Motion */
  --ease-reveal: 1s cubic-bezier(0, 0.22, 0, 0.99);

  /* Spacing */
  --gutter-sm: 10px;
  --gutter-md: 30px;
}

/* ---------------------------------------------------------------- reset */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: clamp(1.125rem, 1.5vw, 1.25rem);
  line-height: 1.5;
  color: var(--color-alterra-black);
  background: var(--color-warm-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img, svg { display: block; max-width: 100%; }
p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 700;
  margin: 0;
  color: var(--color-alterra-black);
}

a { color: var(--color-orange); text-decoration: underline; text-underline-offset: 2px; transition: color 0.2s ease; }
a:hover { color: var(--color-orange-dark); text-decoration: none; }

:focus-visible { outline: 3px solid var(--color-orange); outline-offset: 3px; border-radius: 2px; }
.on-dark :focus-visible { outline-color: var(--color-white); }

/* ------------------------------------------------------------ container */
.wrap { width: 100%; margin-inline: auto; padding-inline: var(--gutter-sm); }
@media (min-width: 768px) { .wrap { padding-inline: var(--gutter-md); } }
@media (min-width: 1024px) { .wrap { width: 82vw; max-width: 1570px; padding-inline: 0; } }

.section { padding-block: 48px; }
@media (min-width: 1024px) { .section { padding-block: 8rem; } }
.section--alt { background: var(--color-off-white); }

.eyebrow {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 1rem;
  line-height: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-orange);
  margin: 0 0 1rem;
}
.section-head { max-width: 44rem; margin-bottom: 3.5rem; }
.section-head h2 { margin-bottom: 0.5rem; }
.section-head p { color: var(--color-soft-black); margin-bottom: 0; }

h2 { font-size: clamp(2.25rem, 5.5vw, 4rem); line-height: 1.05; letter-spacing: -0.0625rem; }
h3 { font-size: clamp(1.375rem, 2.4vw, 1.75rem); line-height: 1.1; letter-spacing: -0.5px; }

.skip-link {
  position: absolute; left: 1rem; top: -3.5rem;
  background: var(--color-orange); color: #fff;
  padding: 0.6rem 1rem; border-radius: var(--radius-sm); font-family: var(--font-sans); font-weight: 600;
  text-decoration: none; transition: top 0.15s ease; z-index: 100;
}
.skip-link:focus { top: 1rem; }

/* -------------------------------------------------- buttons (signature) */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.6rem;
  padding: 15px 40px;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 1.125rem; font-weight: 600; line-height: 1.25;
  text-decoration: none; border: 1px solid transparent; cursor: pointer;
  transition: all 0.6s ease-out;
}
.btn .arw { transition: transform 0.3s ease-out; }
.btn:hover .arw { transform: translateX(4px); }

.btn--solid-orange { background: var(--color-orange); color: #fff; box-shadow: inset 0 0 0 0 var(--color-black); }
.btn--solid-orange:hover, .btn--solid-orange:focus-visible { color: #fff; box-shadow: inset 600px 0 0 0 var(--color-black); }
.btn--solid-orange:active { background: var(--color-soft-black); border-color: var(--color-soft-black); }

.btn--solid-black { background: var(--color-black); color: #fff; border-color: var(--color-black); box-shadow: inset 0 0 0 0 var(--color-orange); }
.btn--solid-black:hover, .btn--solid-black:focus-visible { border-color: #fff; box-shadow: inset 600px 0 0 0 var(--color-orange); color: #fff; }

.btn--outline-dark { color: var(--color-black); border-color: var(--color-black); background: transparent; box-shadow: inset 0 0 0 0 var(--color-orange); }
.btn--outline-dark:hover, .btn--outline-dark:focus-visible { color: #fff; border-color: var(--color-orange); background: var(--color-orange); box-shadow: inset 600px 0 0 0 var(--color-orange); }

/* orange fill that sweeps to white, for use on dark surfaces */
.btn--on-dark { background: var(--color-orange); color: #fff; box-shadow: inset 0 0 0 0 #fff; }
.btn--on-dark:hover, .btn--on-dark:focus-visible { color: var(--color-alterra-black); box-shadow: inset 600px 0 0 0 #fff; }

/* --------------------------------------------------------------- header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(243, 243, 239, 0.82);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  border-bottom: 1px solid var(--color-gray-300);
}
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; min-height: 72px; }
.brand { display: flex; align-items: baseline; gap: 0.6rem; text-decoration: none; }
.brand .mark { font-family: var(--font-serif); font-weight: 700; font-size: 1.6rem; color: var(--color-alterra-black); letter-spacing: -0.5px; }
.brand .mark .dot { color: var(--color-orange); }
.brand .kit { font-family: var(--font-sans); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.14em; text-transform: uppercase; color: var(--color-gray-500); }
.nav { display: flex; align-items: center; gap: 2rem; }
.nav-link { position: relative; color: var(--color-alterra-black); text-decoration: none; font-family: var(--font-sans); font-weight: 500; font-size: 1rem; }
.nav-link::after { content: ""; position: absolute; left: 0; bottom: -6px; height: 2px; width: 0; background: var(--color-orange); transition: width 0.25s ease; }
.nav-link:hover::after { width: 100%; }
.nav .btn { padding: 11px 24px; font-size: 1rem; }
@media (max-width: 860px) { .nav .nav-link { display: none; } }

/* ----------------------------------------------------------------- hero */
.hero { background: var(--color-warm-white); }
.hero .wrap { padding-block: clamp(3.5rem, 10vw, 8rem); }
.hero-inner { max-width: 60rem; }
.hero h1 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(3rem, 8vw, 8.125rem);
  line-height: 1.02;
  letter-spacing: -0.125rem;
  margin: 0.75rem 0 1.5rem;
}
.hero h1 .accent { color: var(--color-orange); font-style: italic; }
.hero-sub {
  font-family: var(--font-sans);
  font-size: clamp(1.25rem, 1.8vw, 1.5rem);
  line-height: 1.5; color: var(--color-soft-black);
  max-width: 40rem; margin-bottom: 2.5rem;
}
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.25rem; }
.hero-note { font-family: var(--font-sans); font-size: 1rem; color: var(--color-gray-500); }
.hero-note strong { color: var(--color-alterra-black); font-weight: 600; }

/* thin editorial rule that separates hero from the body */
.rule-orange { height: 3px; background: var(--color-orange); width: 100%; }

/* --------------------------------------------------------- value cards */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
@media (max-width: 800px) { .cards { grid-template-columns: 1fr; } }
.card {
  background: var(--color-white); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xs); padding: 2rem;
}
.card .kicker { font-family: var(--font-sans); font-weight: 600; font-size: 0.85rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--color-orange); margin-bottom: 1rem; }
.card h3 { margin-bottom: 0.6rem; }
.card p { color: var(--color-soft-black); font-size: 1.0625rem; margin-bottom: 0; }

/* --------------------------------------------------- split (add / use) */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 5vw, 5rem); align-items: start; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; gap: 3rem; } }
.split h2 { font-size: clamp(1.875rem, 3.5vw, 2.75rem); }
.split .eyebrow { margin-bottom: 0.75rem; }

.steps { list-style: none; margin: 1.75rem 0 0; padding: 0; display: grid; gap: 1.75rem; counter-reset: step; }
.steps li { display: grid; grid-template-columns: auto 1fr; gap: 1.25rem; align-items: start; }
.steps li::before {
  counter-increment: step; content: counter(step);
  font-family: var(--font-sans); font-weight: 600; font-size: 1.05rem;
  width: 2.75rem; height: 2.75rem; border-radius: var(--radius-pill);
  display: grid; place-items: center;
  background: var(--color-alterra-black); color: #fff;
}
.steps h3 { font-size: 1.25rem; margin-bottom: 0.25rem; }
.steps p { color: var(--color-soft-black); font-size: 1.0625rem; margin-bottom: 0; }
.steps code {
  font-family: var(--font-sans); font-weight: 500; font-size: 0.95em;
  background: var(--color-gray-100); border: 1px solid var(--color-gray-200);
  border-radius: 6px; padding: 0.08em 0.4em;
}
.steps .btn { margin-top: 1rem; }

.prereqs { list-style: none; margin: 1.75rem 0 0; padding: 0; display: grid; gap: 1.25rem; }
.prereqs li { display: grid; grid-template-columns: auto 1fr; gap: 1rem; align-items: start; }
.prereqs .chk { flex: none; width: 1.9rem; height: 1.9rem; margin-top: 0.05rem; border-radius: var(--radius-pill); background: var(--color-orange); color: #fff; display: grid; place-items: center; font-weight: 700; }
.prereqs strong { display: block; font-family: var(--font-sans); font-weight: 600; }
.prereqs span.sub { color: var(--color-soft-black); }
.note-inline { margin-top: 2rem; font-size: 1rem; color: var(--color-soft-black); border-left: 3px solid var(--color-orange); padding-left: 1rem; }

/* ---------------------------------------------------- faux-chat demo */
.demo { background: var(--color-white); border: 1px solid var(--color-gray-200); border-radius: var(--radius-lg); box-shadow: var(--shadow-xl); padding: 1.25rem; }
.demo-bar { display: flex; align-items: center; gap: 0.4rem; padding: 0.25rem 0.35rem 1.1rem; }
.demo-bar i { width: 0.7rem; height: 0.7rem; border-radius: 50%; background: var(--color-gray-300); }
.demo-bar span { margin-left: auto; font-family: var(--font-sans); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-gray-500); }
.bubble { border-radius: 14px; padding: 0.9rem 1.15rem; margin-bottom: 0.8rem; max-width: 90%; font-family: var(--font-sans); font-size: 1rem; line-height: 1.45; }
.bubble .who { font-size: 0.68rem; letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 0.35rem; opacity: 0.7; }
.bubble.you { background: var(--color-alterra-black); color: #fff; margin-left: auto; border-bottom-right-radius: 4px; }
.bubble.bot { background: var(--color-gray-100); color: var(--color-alterra-black); border-bottom-left-radius: 4px; }
.chips { display: flex; flex-wrap: wrap; gap: 0.45rem; margin-top: 0.8rem; }
.chip { font-family: var(--font-sans); font-size: 0.82rem; font-weight: 600; padding: 0.35rem 0.75rem; border-radius: var(--radius-pill); background: #fff; border: 1px solid var(--color-gray-300); color: var(--color-alterra-black); }
.chip.on { background: var(--color-orange); color: #fff; border-color: var(--color-orange); }
.demo-out { display: flex; align-items: center; gap: 0.8rem; margin-top: 0.25rem; padding: 0.9rem 1.15rem; background: rgba(212, 65, 38, 0.07); border: 1px solid rgba(212, 65, 38, 0.32); border-radius: 14px; font-family: var(--font-sans); font-weight: 600; font-size: 0.98rem; }
.demo-out .dot { flex: none; width: 1.5rem; height: 1.5rem; border-radius: 50%; background: var(--color-orange); color: #fff; display: grid; place-items: center; font-weight: 700; }

/* ---------------------------------------------------- honest edges */
.edges { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media (max-width: 800px) { .edges { grid-template-columns: 1fr; } }
.edge { background: var(--color-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-xs); padding: 2rem; }
.edge .tag { display: inline-block; font-family: var(--font-sans); font-size: 0.75rem; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase; padding: 0.3rem 0.7rem; border-radius: 8px; margin-bottom: 1rem; }
.edge.does .tag { color: var(--color-orange); background: rgba(212, 65, 38, 0.08); }
.edge.doesnt .tag { color: var(--color-gray-500); background: var(--color-gray-100); }
.edge h3 { margin-bottom: 0.75rem; }
.edge ul { margin: 0; padding-left: 1.15rem; color: var(--color-soft-black); font-size: 1.0625rem; }
.edge li { margin-bottom: 0.6rem; }
.edge li:last-child { margin-bottom: 0; }
.edge li::marker { color: var(--color-orange); }

/* ----------------------------------------------------------- brands */
.brand-meta { display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; margin-bottom: 2.5rem; }
.version-pill { display: inline-flex; align-items: center; gap: 0.55rem; font-family: var(--font-sans); font-weight: 600; font-size: 0.95rem; background: var(--color-alterra-black); color: #fff; padding: 0.5rem 1rem; border-radius: var(--radius-pill); }
.version-pill .lbl { color: var(--color-orange); letter-spacing: 0.08em; text-transform: uppercase; font-size: 0.72rem; }
.brand-note { color: var(--color-soft-black); font-size: 1rem; }
.brand-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.85rem; }
@media (max-width: 780px) { .brand-grid { grid-template-columns: repeat(2, 1fr); } }
.brand-cell { background: var(--color-white); border: 1px solid var(--color-gray-300); border-radius: var(--radius-sm); padding: 1rem 1.15rem; font-family: var(--font-sans); font-weight: 600; font-size: 1rem; display: flex; align-items: center; gap: 0.65rem; }
.brand-cell::before { content: ""; width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--color-orange); flex: none; }
.brand-cell.pending { border-style: dashed; color: var(--color-soft-black); font-style: italic; }
.brand-cell.pending::before { background: var(--color-gray-300); }

/* ----------------------------------------------------------- CTA band */
.cta { background: var(--color-alterra-black); color: var(--color-white); text-align: center; }
.cta .wrap { padding-block: clamp(3.5rem, 8vw, 6rem); }
.cta h2 { color: #fff; font-size: clamp(2.25rem, 5vw, 3.75rem); margin-bottom: 1rem; }
.cta p { color: rgba(255, 255, 255, 0.72); font-family: var(--font-sans); font-size: 1.2rem; margin: 0 auto 2rem; max-width: 34rem; }

/* --------------------------------------------------- feedback + footer */
.feedback-card { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 1.5rem; background: var(--color-white); border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); padding: 2rem 2.25rem; }
.feedback-card h3 { margin-bottom: 0.35rem; }
.feedback-card p { color: var(--color-soft-black); max-width: 34rem; margin-bottom: 0; }

.site-footer { background: var(--color-off-white); border-top: 1px solid var(--color-gray-300); }
.site-footer .wrap { padding-block: 3rem; display: grid; gap: 1.5rem; }
.footer-top { display: flex; flex-wrap: wrap; align-items: baseline; justify-content: space-between; gap: 1rem; }
.footer-top .mark { font-family: var(--font-serif); font-weight: 700; font-size: 1.4rem; }
.footer-top .mark .dot { color: var(--color-orange); }
.footer-meta { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; font-family: var(--font-sans); font-size: 0.9rem; color: var(--color-gray-500); }
.footer-honest { font-family: var(--font-sans); font-size: 0.95rem; line-height: 1.65; color: var(--color-soft-black); max-width: 60rem; border-top: 1px solid var(--color-gray-300); padding-top: 1.5rem; }
.footer-honest strong { color: var(--color-alterra-black); font-weight: 600; }

/* placeholder marker for anything filled at the readiness gate */
.tbd { border-bottom: 1px dashed currentColor; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
}